You can view recent work and see readings from various projects by selecting one of the photo gallery presentations below.
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Dielectric Switch Finger (Video) |
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Dielectric Switch Finger |
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CRE Shows Apple iPhone / BDI User Interface Compatibility (Video) |
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WKQX Line Matcher Installation and RF Sweep Data |
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ERI Coax Switch Installation, April 2009 |
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WKQX ERI Line Matcher, April 2009 |
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Dr. White performs RF Network Analysis of (1) the ERI Tuning Slug Transmission line, (2) the ERI VHF Coaxial Switch, and (3) the ERI Main Antenna, and their 'system' final impedance load presented to the Shively Combiner Output, March 2009 |
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Completion of connections of the new ERI 6 Inch coax switch to the output of the Shively Combiner and ERI Tuning Slug Transmission Line, March 2009 |
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ERI 6-1/8 , 50 VHF Coaxial Switch RF Port-to-Port Sweeps |
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Dr. White fully tests the John Hancock Center Combiner ERI 6 Inch Coax Switch for (1) RF bandwidth, (2) Return Loss, (3) Characteristic 50 ohm Impedance, (4) Consistent RF Impedance verses 25 position cycles, and (5) 12 volt external logic control. This photo gallery shows the results and test setup. Dr. White rates the ERI switch "PRISTINE". |
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Dr. White shows how the "Degree of Freedom" is related to rotations in the Input Tuning Control on a Tube-Type PA Final Deck, and how small rotational movement creates "Large Scale Deviations" in the PA input impedance and VSWR Load Slope in tube type FM transmitters |
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Combiner Dielectric Coax Switch Removal, February 2009 |
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Dielectric Coax Switch Engineering Evaluation Photo Record, December 2008 |
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ERI Tuning Slug Transmission
Line Sweep Measurements, December 2008 |
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ERI Power Splitter and Antenna Measurements, November 2008 |
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Test Calibration of HP 436A Power Meter and Bird Wattmeter, Plus Test Setup Measuring RF Received Power on ALERI Antenna |
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Shively Filter Tuning Control Physical Clearance |
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Shively Power Hybrid Removal |
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ALERI Antenna Measurements |
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Transmission Line Pressure Repair (May 2008) |
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Station Reject Load Sample and Power Measurements (May 2008) |
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BDI Control System |
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JHC 97th Floor Tower Light Interface |
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Power Measurements (March 2008) |
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ALERI Transmission Line Dehydrator |
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ERI Transmission Line Dehydrator |
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Interlock & Watt Meter Physical Order |
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Narrow Band Input Measurements |
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HP 8901A AM Noise Measurements |
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ERI Controller Installation - Phase 1 |
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Dialectric Antenna Coax Switch |
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Pressure System |
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Richland Individual FM Station Measurements |
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Richland Measurements |
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IBOC Coax Switch Installation |
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WLUP Bandwidth |
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WKQX Bandwidth |
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IBOC Watt Meter Installation |
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Generator Computer Interface |
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Generator Floor Plans |
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93 Floor Automatic Transfer Switch |
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ERI Backup Antenna |
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West Tower |
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Alford Antenna Exterior |
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Alford Antenna Tower Feed |
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Alford Logic |
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Alford Mead Instructions |
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Antenna Switch |
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Best UPS Removal |
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Component Temperature Measurements |
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Computer |
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FM Station Broadcast Spectrums |
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Half Power Controller |
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Alford Dummy Load Repair |
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Lock-Out: Tag-Out Switches |
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Reflected Power Tests |
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Safety Switch Covers |
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Transmission Line Dehydrator |
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UPS Installation |
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WLP Protoype RF Sampling |
